Some config settings set to default to true

- If the environmental variable isn't set, default to true.

config.js.template

@@ -3,11 +3,11 @@ const config = {
   use_reddit_oauth: process.env.USE_REDDIT_OAUTH === 'true' || false, // If false, teddit uses Reddit's public API. If true, you need to have your own Reddit app ID (enter the app ID to the "reddit_app_id" config key). 
   cert_dir: process.env.CERT_DIR || '', // For example '/home/teddit/letsencrypt/live/teddit.net', if you are using https. No trailing slash.
   theme: process.env.THEME || 'auto', // One of: 'dark', 'sepia', 'auto', ''. Auto theme uses browser's theme detection (Dark or White theme). White theme is set by the empty the option ('').
-  flairs_enabled: process.env.FLAIRS_ENABLED === 'true', // Enables the rendering of user and link flairs on teddit
+  flairs_enabled: !('FLAIRS_ENABLED' in process.env) || process.env.FLAIRS_ENABLED === 'true', // Enables the rendering of user and link flairs on teddit
-  highlight_controversial: process.env.HIGHLIGHT_CONTROVERSIAL === 'true', // Enables controversial comments to be indicated by a typographical dagger (†)
+  highlight_controversial: !('HIGHLIGHT_CONTROVERSIAL' in process.env) || process.env.HIGHLIGHT_CONTROVERSIAL === 'true', // Enables controversial comments to be indicated by a typographical dagger (†)
-  api_enabled: process.env.API_ENABLED === 'true', // Teddit API feature. Might increase loads significantly on your instance.
+  api_enabled: !('API_ENABLED' in process.env) || process.env.API_ENABLED === 'true', // Teddit API feature. Might increase loads significantly on your instance.
-  video_enabled: process.env.VIDEO_ENABLED === 'true',
+  video_enabled: !('VIDEO_ENABLED' in process.env) || process.env.VIDEO_ENABLED === 'true',
-  redis_enabled: process.env.REDIS_ENABLED === 'true', // If disabled, does not cache Reddit API calls
+  redis_enabled: !('REDIS_ENABLED' in process.env) || process.env.REDIS_ENABLED === 'true', // If disabled, does not cache Reddit API calls
   redis_db: process.env.REDIS_DB,
   redis_host: process.env.REDIS_HOST || '127.0.0.1',
   redis_password: process.env.REDIS_PASSWORD,
@@ -18,23 +18,23 @@ const config = {
   https_enabled: process.env.HTTPS_ENABLED === 'true' || false,
   redirect_http_to_https: process.env.REDIRECT_HTTP_TO_HTTPS === 'true' || false,
   redirect_www: process.env.REDIRECT_WWW === 'true' || false,
-  use_compression: process.env.USE_COMPRESSION === 'true',
+  use_compression: !('USE_COMPRESSION' in process.env) || process.env.USE_COMPRESSION === 'true',
   use_view_cache: process.env.USE_VIEW_CACHE === 'true' || false,
   use_helmet: process.env.USE_HELMET === 'true' || false, // Recommended to be true when using https
   use_helmet_hsts: process.env.USE_HELMET_HSTS === 'true' || false, // Recommended to be true when using https
   trust_proxy: process.env.TRUST_PROXY === 'true' || false, // Enable trust_proxy if you are using reverse proxy like nginx
   trust_proxy_address: process.env.TRUST_PROXY_ADDRESS || '127.0.0.1',
   http_proxy: process.env.HTTP_PROXY,
-  nsfw_enabled: process.env.NSFW_ENABLED === 'true', // Enable NSFW (over 18) content. If false, a warning is shown to the user before opening any NSFW post. When the NFSW content is disabled, NSFW posts are hidden from subreddits and from user page feeds. Note: Users can set this to true or false from their preferences.
+  nsfw_enabled: !('NSFW_ENABLED' in process.env) || process.env.NSFW_ENABLED === 'true', // Enable NSFW (over 18) content. If false, a warning is shown to the user before opening any NSFW post. When the NFSW content is disabled, NSFW posts are hidden from subreddits and from user page feeds. Note: Users can set this to true or false from their preferences.
-  videos_muted: process.env.VIDEOS_MUTED === 'true', // Automatically mute all videos in posts
+  videos_muted: !('VIDEOS_MUTED' in process.env) || process.env.VIDEOS_MUTED === 'true', // Automatically mute all videos in posts
   post_comments_sort: process.env.POST_COMMENTS_SORT || 'confidence', // "confidence" is the default sorting in Reddit. Must be one of: confidence, top, new, controversial, old, random, qa, live.
   reddit_app_id: process.env.REDDIT_APP_ID || 'ABfYqdDc9qPh1w', // If "use_reddit_oauth" config key is set to true, you have to obtain your Reddit app ID. For testing purposes it's okay to use this project's default app ID. Create your Reddit app here: https://old.reddit.com/prefs/apps/. Make sure to create an "installed app" type of app.
   domain_replacements: process.env.DOMAIN_REPLACEMENTS
     ? (JSON.parse(process.env.DOMAIN_REPLACEMENTS).map(([p, r]) => [new RegExp(p, 'gm'), r]))
     : [], // Replacements for domains in outgoing links. Tuples with regular expressions to match, and replacement values. This is in addition to user-level configuration of privacyDomains.
-  cache_control: process.env.CACHE_CONTROL === 'true', // If true, teddit will automatically remove all cached static files. By default this is set to true.
+  cache_control: !('CACHE_CONTROL' in process.env) || process.env.CACHE_CONTROL === 'true', // If true, teddit will automatically remove all cached static files. By default this is set to true.
   cache_control_interval: process.env.CACHE_CONTROL_INTERVAL || 24, // How often the cache directory for static files is emptied (in hours). Requires cache_control to be true. Default is every 24 hours.
-  show_upvoted_percentage: process.env.SHOW_UPVOTED_PERCENTAGE === 'true' || true,
+  show_upvoted_percentage: !('SHOW_UPVOTED_PERCENTAGE' in process.env) || process.env.SHOW_UPVOTED_PERCENTAGE === 'true',
   post_media_max_heights: {
     /**
     * Sets the max-height value for images and videos in posts.