Document database connection retries and change alpine repo for catatonit

(cherry picked from commit 88e3835050c0418c060c8e3a704894763ee33aa0)

.env.template

@@ -82,6 +82,10 @@
 ## cause performance degradation or might render  the service unable to start.
 # ENABLE_DB_WAL=true
 
+## Database connection retries
+## Number of times to retry the database connection during startup, with 1 second delay between each retry, set to 0 to retry indefinitely
+# DB_CONNECTION_RETRIES=15
+
 ## Disable icon downloading
 ## Set to true to disable icon downloading, this would still serve icons from $ICON_CACHE_FOLDER,
 ## but it won't produce any external network request. Needs to set $ICON_CACHE_TTL to 0,

docker/Dockerfile.j2

@@ -242,7 +242,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 {% endif %}
 {% if "alpine" in target_file and "arm32v7" in target_file %}
-RUN apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing catatonit
+RUN apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/community catatonit
 {% endif %}
 
 RUN mkdir /data

docker/arm32v7/Dockerfile.alpine

@@ -79,7 +79,7 @@ RUN apk add --no-cache \
         openssl \
         curl \
         ca-certificates
-RUN apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing catatonit
+RUN apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/community catatonit
 
 RUN mkdir /data