[feature] S3 support (#674)

* feat: vendor minio client

* feat: introduce storage package with s3 support

* feat: serve s3 files directly

this saves a lot of bandwith as the files are fetched from the object
store directly

* fix: use explicit local storage in tests

* feat: integrate s3 storage with the main server

* fix: add s3 config to cli tests

* docs: explicitly set values in example config

also adds license header to the storage package

* fix: use better http status code on s3 redirect

HTTP 302 Found is the best fit, as it signifies that the resource
requested was found but not under its presumed URL

307/TemporaryRedirect would mean that this resource is usually located
here, not in this case

303/SeeOther indicates that the redirection does not link to the
requested resource but to another page

* refactor: use context in storage driver interface

internal/config/helpers.gen.go

@@ -843,6 +843,131 @@ func GetStorageLocalBasePath() string { return global.GetStorageLocalBasePath()
 // SetStorageLocalBasePath safely sets the value for global configuration 'StorageLocalBasePath' field
 func SetStorageLocalBasePath(v string) { global.SetStorageLocalBasePath(v) }
 
+// GetStorageS3Endpoint safely fetches the Configuration value for state's 'StorageS3Endpoint' field
+func (st *ConfigState) GetStorageS3Endpoint() (v string) {
+	st.mutex.Lock()
+	v = st.config.StorageS3Endpoint
+	st.mutex.Unlock()
+	return
+}
+
+// SetStorageS3Endpoint safely sets the Configuration value for state's 'StorageS3Endpoint' field
+func (st *ConfigState) SetStorageS3Endpoint(v string) {
+	st.mutex.Lock()
+	defer st.mutex.Unlock()
+	st.config.StorageS3Endpoint = v
+	st.reloadToViper()
+}
+
+// StorageS3EndpointFlag returns the flag name for the 'StorageS3Endpoint' field
+func StorageS3EndpointFlag() string { return "storage-s3-endpoint" }
+
+// GetStorageS3Endpoint safely fetches the value for global configuration 'StorageS3Endpoint' field
+func GetStorageS3Endpoint() string { return global.GetStorageS3Endpoint() }
+
+// SetStorageS3Endpoint safely sets the value for global configuration 'StorageS3Endpoint' field
+func SetStorageS3Endpoint(v string) { global.SetStorageS3Endpoint(v) }
+
+// GetStorageS3AccessKey safely fetches the Configuration value for state's 'StorageS3AccessKey' field
+func (st *ConfigState) GetStorageS3AccessKey() (v string) {
+	st.mutex.Lock()
+	v = st.config.StorageS3AccessKey
+	st.mutex.Unlock()
+	return
+}
+
+// SetStorageS3AccessKey safely sets the Configuration value for state's 'StorageS3AccessKey' field
+func (st *ConfigState) SetStorageS3AccessKey(v string) {
+	st.mutex.Lock()
+	defer st.mutex.Unlock()
+	st.config.StorageS3AccessKey = v
+	st.reloadToViper()
+}
+
+// StorageS3AccessKeyFlag returns the flag name for the 'StorageS3AccessKey' field
+func StorageS3AccessKeyFlag() string { return "storage-s3-access-key" }
+
+// GetStorageS3AccessKey safely fetches the value for global configuration 'StorageS3AccessKey' field
+func GetStorageS3AccessKey() string { return global.GetStorageS3AccessKey() }
+
+// SetStorageS3AccessKey safely sets the value for global configuration 'StorageS3AccessKey' field
+func SetStorageS3AccessKey(v string) { global.SetStorageS3AccessKey(v) }
+
+// GetStorageS3SecretKey safely fetches the Configuration value for state's 'StorageS3SecretKey' field
+func (st *ConfigState) GetStorageS3SecretKey() (v string) {
+	st.mutex.Lock()
+	v = st.config.StorageS3SecretKey
+	st.mutex.Unlock()
+	return
+}
+
+// SetStorageS3SecretKey safely sets the Configuration value for state's 'StorageS3SecretKey' field
+func (st *ConfigState) SetStorageS3SecretKey(v string) {
+	st.mutex.Lock()
+	defer st.mutex.Unlock()
+	st.config.StorageS3SecretKey = v
+	st.reloadToViper()
+}
+
+// StorageS3SecretKeyFlag returns the flag name for the 'StorageS3SecretKey' field
+func StorageS3SecretKeyFlag() string { return "storage-s3-secret-key" }
+
+// GetStorageS3SecretKey safely fetches the value for global configuration 'StorageS3SecretKey' field
+func GetStorageS3SecretKey() string { return global.GetStorageS3SecretKey() }
+
+// SetStorageS3SecretKey safely sets the value for global configuration 'StorageS3SecretKey' field
+func SetStorageS3SecretKey(v string) { global.SetStorageS3SecretKey(v) }
+
+// GetStorageS3UseSSL safely fetches the Configuration value for state's 'StorageS3UseSSL' field
+func (st *ConfigState) GetStorageS3UseSSL() (v bool) {
+	st.mutex.Lock()
+	v = st.config.StorageS3UseSSL
+	st.mutex.Unlock()
+	return
+}
+
+// SetStorageS3UseSSL safely sets the Configuration value for state's 'StorageS3UseSSL' field
+func (st *ConfigState) SetStorageS3UseSSL(v bool) {
+	st.mutex.Lock()
+	defer st.mutex.Unlock()
+	st.config.StorageS3UseSSL = v
+	st.reloadToViper()
+}
+
+// StorageS3UseSSLFlag returns the flag name for the 'StorageS3UseSSL' field
+func StorageS3UseSSLFlag() string { return "storage-s3-use-ssl" }
+
+// GetStorageS3UseSSL safely fetches the value for global configuration 'StorageS3UseSSL' field
+func GetStorageS3UseSSL() bool { return global.GetStorageS3UseSSL() }
+
+// SetStorageS3UseSSL safely sets the value for global configuration 'StorageS3UseSSL' field
+func SetStorageS3UseSSL(v bool) { global.SetStorageS3UseSSL(v) }
+
+// GetStorageS3BucketName safely fetches the Configuration value for state's 'StorageS3BucketName' field
+func (st *ConfigState) GetStorageS3BucketName() (v string) {
+	st.mutex.Lock()
+	v = st.config.StorageS3BucketName
+	st.mutex.Unlock()
+	return
+}
+
+// SetStorageS3BucketName safely sets the Configuration value for state's 'StorageS3BucketName' field
+func (st *ConfigState) SetStorageS3BucketName(v string) {
+	st.mutex.Lock()
+	defer st.mutex.Unlock()
+	st.config.StorageS3BucketName = v
+	st.reloadToViper()
+}
+
+// StorageS3BucketNameFlag returns the flag name for the 'StorageS3BucketName' field
+func StorageS3BucketNameFlag() string { return "storage-s3-bucket" }
+
+// GetStorageS3BucketName safely fetches the value for global configuration 'StorageS3BucketName' field
+func GetStorageS3BucketName() string { return global.GetStorageS3BucketName() }
+
+// SetStorageS3BucketName safely sets the value for global configuration 'StorageS3BucketName' field
+func SetStorageS3BucketName(v string) { global.SetStorageS3BucketName(v) }
+
 // GetStatusesMaxChars safely fetches the Configuration value for state's 'StatusesMaxChars' field
 func (st *ConfigState) GetStatusesMaxChars() (v int) {
 	st.mutex.Lock()