feat: added missing dockerfile and runs.using configuration

Dockerfile

@@ -0,0 +1,5 @@
+FROM golang:1.19
+WORKDIR /src
+COPY . . 
+RUN go build -o /bin/app .
+ENTRYPOINT ["/bin/app"]

action.yml

@@ -1,7 +1,10 @@
 name: Gitea Release Drafter
 author: Christian Schulze
 description: "automates release notes as a draft release whenever a pull request finds it's way into the default branch of your repository"
+runs:
+  using: docker
+  image: Dockerfile
 inputs:
   config-path:
-    description: 'Path of the configuration file for the drafter action'
-    required: false
+    description: "Path of the configuration file for the drafter action"
+    required: false