modify entrypoint file to work using sh instead of bash, rtfm

entrypoint.sh.tmpl

@@ -1,27 +1,15 @@
 #!/bin/sh
 
-set -e
+if [ -f /run/secrets/oidc_secret ]; then
+  export GTS_OIDC_CLIENT_SECRET=$(cat /run/secrets/oidc_secret)
+else
+  echo "OIDC secret not found, skipping."
+fi
 
-file_env() {
-   local var="$1"
-   local fileVar="${var}_FILE"
-   local def="${2:-}"
+if [ -f /run/secrets/smtp_password ]; then
+  export GTS_SMTP_PASSWORD=$(cat /run/secrets/smtp_password)
+else
+  echo "SMTP password secret not found, skipping."
+fi
 
-   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"
-}
-file_env "GTS_OIDC_CLIENT_SECRET"
-file_env "GTS_SMTP_PASSWORD"
+/gotosocial/gotosocial server start