feat: source .env if exists

build.sh

@@ -1,5 +1,7 @@
 #!/bin/sh -ex
 
+. ./.env || true
+
 cat <<EOF > /kaniko/.docker/config.json
 {
   "auths": {
@@ -11,9 +13,13 @@ cat <<EOF > /kaniko/.docker/config.json
 }
 EOF
 
-REGISTRY="$(echo "$GITHUB_SERVER_URL" | sed 's .*://  ')"
+if [ -z "$IMAGEAPP" ]; then
+    REGISTRY="$(echo "$GITHUB_SERVER_URL" | sed 's .*://  ')"
+    IMAGEAPP="$REGISTRY/$INPUT_IMAGE"
+fi
+
 /kaniko/executor \
     --cache=true \
     --context "${INPUT_DOCKERFILE%/*}" \
     --dockerfile "$INPUT_DOCKERFILE" \
-    --destination "$REGISTRY/$INPUT_IMAGE"
+    --destination "$IMAGEAPP"