add docker-entrypoint file to support docker secrets

studio/Dockerfile

@@ -18,6 +18,7 @@ WORKDIR /usr/src/app
 COPY package*.json ./
 RUN npm clean-install && npm cache clean --force
 COPY . .
+ENTRYPOINT ["docker-entrypoint.sh"]
 
 FROM base as dev
 EXPOSE 8082

studio/docker-entrypoint.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+# usage: file_env VAR [DEFAULT]
+#    ie: file_env 'XYZ_DB_PASSWORD' 'example'
+# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
+#  "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
+file_env() {
+	local var="$1"
+	local fileVar="${var}_FILE"
+	local def="${2:-}"
+	if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
+		echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
+		exit 1
+	fi
+	local val="$def"
+	if [ "${!var:-}" ]; then
+		val="${!var}"
+	elif [ "${!fileVar:-}" ]; then
+		val="$(< "${!fileVar}")"
+	fi
+	export "$var"="$val"
+	unset "$fileVar"
+}
+
+# load secrets either from environment variables or files
+file_env 'POSTGRES_PASSWORD'
+file_env 'SUPABASE_ANON_KEY'
+file_env 'SUPABASE_SERVICE_KEY'
+
+exec "${@}"