Prepare dockerfile for use, allow configuring via env vars

entrypoint.sh

@@ -2,25 +2,11 @@
 set -e
 echo 'Entrypoint script'
 cd /usr/src/app
+
+# blank config, use defaults
 cp /etc/sponsorblock/config.json . || cat <<EOF > config.json
 {
-    "port": 8080,
-    "globalSalt": "[CHANGE THIS]",
-    "adminUserID": "[CHANGE THIS]",
-    "youtubeAPIKey": null,
-    "discordReportChannelWebhookURL": null, 
-    "discordFirstTimeSubmissionsWebhookURL": null, 
-    "discordAutoModWebhookURL": null,
-    "proxySubmission": null,
-    "behindProxy": "X-Forwarded-For",
-    "db": "./databases/sponsorTimes.db",
-    "privateDB": "./databases/private.db",
-    "createDatabaseIfNotExist": true,
-    "schemaFolder": "./databases",
-    "dbSchema": "./databases/_sponsorTimes.db.sql",
-    "privateDBSchema": "./databases/_private.db.sql",
-    "mode": "development",
-    "readOnly": false
 }
 EOF
-node dist/index.js
+
+node dist/index.js