Only create DB directory if using embedded DB (#267)

If an external database is being used there is no need to create the
local database files. This prevents the database files from being
created unless the embedded database is being used.

Author: jerrykan

entrypoint.sh

@@ -1,6 +1,10 @@
 #!/bin/sh
 set -e
 
+if [ "$DATABASE_URL" = "postgresql://postgres@localhost:5432/sourcebot" ]; then
+    DATABASE_EMBEDDED="true"
+fi
+
 echo -e "\e[34m[Info] Sourcebot version: $NEXT_PUBLIC_SOURCEBOT_VERSION\e[0m"
 
 # If we don't have a PostHog key, then we need to disable telemetry.
@@ -30,7 +34,7 @@ if [ ! -d "$DATA_CACHE_DIR" ]; then
 fi
 
 # Check if DATABASE_DATA_DIR exists, if not initialize it
-if [ ! -d "$DATABASE_DATA_DIR" ]; then
+if [ "$DATABASE_EMBEDDED" = "true" ] && [ ! -d "$DATABASE_DATA_DIR" ]; then
     echo -e "\e[34m[Info] Initializing database at $DATABASE_DATA_DIR...\e[0m"
     mkdir -p $DATABASE_DATA_DIR && chown -R postgres:postgres "$DATABASE_DATA_DIR"
     su postgres -c "initdb -D $DATABASE_DATA_DIR"
@@ -129,7 +133,7 @@ echo "{\"version\": \"$NEXT_PUBLIC_SOURCEBOT_VERSION\", \"install_id\": \"$SOURC
 
 
 # Start the database and wait for it to be ready before starting any other service
-if [ "$DATABASE_URL" = "postgresql://postgres@localhost:5432/sourcebot" ]; then
+if [ "$DATABASE_EMBEDDED" = "true" ]; then
     su postgres -c "postgres -D $DATABASE_DATA_DIR" &
     until pg_isready -h localhost -p 5432 -U postgres; do
         echo -e "\e[34m[Info] Waiting for the database to be ready...\e[0m"