Expose all env vars to `app` container. (!263)

Resolves coop-cloud/organising#393 and is required for the auto updater coop-cloud/organising#236 (comment)

Co-authored-by: Moritz <moritz.m@local-it.org>
Reviewed-on: #263

cli/app/rollback.go

@@ -178,6 +178,7 @@ recipes.
 		if err != nil {
 			logrus.Fatal(err)
 		}
+		config.ExposeAllEnv(stackName, compose, app.Env)
 
 		if !internal.Force {
 			if err := internal.NewVersionOverview(app, deployedVersion, chosenDowngrade, ""); err != nil {

cli/app/upgrade.go

@@ -189,6 +189,7 @@ recipes.
 		if err != nil {
 			logrus.Fatal(err)
 		}
+		config.ExposeAllEnv(stackName, compose, app.Env)
 
 		if err := internal.NewVersionOverview(app, deployedVersion, chosenUpgrade, releaseNotes); err != nil {
 			logrus.Fatal(err)

cli/internal/deploy.go

@@ -134,6 +134,7 @@ func DeployAction(c *cli.Context) error {
 	if err != nil {
 		logrus.Fatal(err)
 	}
+	config.ExposeAllEnv(app.StackName(), compose, app.Env)
 
 	if err := DeployOverview(app, version, "continue with deployment?"); err != nil {
 		logrus.Fatal(err)

pkg/config/app.go

@@ -447,3 +447,20 @@ func GetAppComposeConfig(recipe string, opts stack.Deploy, appEnv AppEnv) (*comp
 
 	return compose, nil
 }
+
+// ExposeAllEnv exposes all env variables to the app container
+func ExposeAllEnv(stackName string, compose *composetypes.Config, appEnv AppEnv) {
+	for _, service := range compose.Services {
+		if service.Name == "app" {
+			logrus.Debugf("Add the following environment to the app service config of %s:", stackName)
+			for k, v := range appEnv {
+				_, exists := service.Environment[k]
+				if !exists {
+					value := v
+					service.Environment[k] = &value
+					logrus.Debugf("Add Key: %s Value: %s to %s", k, value, stackName)
+				}
+			}
+		}
+	}
+}