Harden hosted DB env wiring and runtime bootstrap

docker/entrypoint.sh

@@ -1,12 +1,38 @@
 #!/usr/bin/env sh
 set -e
 
-cd /var/www/html
+cd /var/www
 
 if [ ! -f .env ]; then
   cp .env.example .env
 fi
 
+# Update .env keys from runtime environment variables when provided.
+set_env() {
+  key="$1"
+  value="$2"
+  if [ -n "$value" ]; then
+    if grep -q "^${key}=" .env; then
+      sed -i "s|^${key}=.*|${key}=${value}|" .env
+    else
+      echo "${key}=${value}" >> .env
+    fi
+  fi
+}
+
+set_env DB_CONNECTION "${DB_CONNECTION}"
+set_env DB_HOST "${DB_HOST}"
+set_env DB_PORT "${DB_PORT}"
+set_env DB_DATABASE "${DB_DATABASE}"
+set_env DB_USERNAME "${DB_USERNAME}"
+set_env DB_PASSWORD "${DB_PASSWORD}"
+set_env DB_URL "${DB_URL}"
+set_env DATABASE_URL "${DATABASE_URL}"
+set_env APP_ENV "${APP_ENV}"
+set_env APP_DEBUG "${APP_DEBUG}"
+set_env APP_URL "${APP_URL}"
+
+php artisan config:clear || true
 php artisan key:generate --force --no-interaction || true
 php artisan storage:link || true