Switch to Java 16, make docker context contain only jar

.dockerignore

@@ -1,6 +0,0 @@
-.github/
-logos/
-screenshots/
-.gitignore
-LICENSE
-README.md

.github/workflows/main.yml

@@ -20,16 +20,18 @@ jobs:
         uses: actions/setup-java@v2
         with:
           distribution: "adopt"
-          java-version: "11"
+          java-version: "16"
 
       - name: Install clojure tools
         uses: DeLaGuardo/setup-clojure@3.5
         with:
           cli: 1.10.3.943
 
-      - name: Build bot
-        run: clojure -T:build uber
+      - name: Build bot and copy out jar for docker
         shell: bash
+        run: |
+          clojure -T:build uber
+          cp target/doplarr.jar docker
 
       - name: Release tagged version
         uses: softprops/action-gh-release@v1
@@ -56,7 +58,7 @@ jobs:
       - name: Build and push Docker image
         uses: docker/build-push-action@v2
         with:
-          context: .
+          context: docker
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM adoptopenjdk/openjdk11:alpine-jre
+FROM adoptopenjdk/openjdk16:alpine-jre
 
 WORKDIR /app