diff --git a/.forgejo/workflows/ci.yml b/.forgejo/workflows/ci.yml
index 3d031b0..69bd367 100644
--- a/.forgejo/workflows/ci.yml
+++ b/.forgejo/workflows/ci.yml
@@ -1,8 +1,7 @@
 name: 'File-uploader-crystal CI'
 
 on:
-  # workflow_dispatch:
-  #   inputs: {}
+  workflow_dispatch:
   schedule:
     - cron: '0 7 * * 0'
   push:
@@ -28,14 +27,14 @@ jobs:
 
     - name: Docker meta
       id: meta
-      uses: https://github.com/docker/metadata-action@v5
+      uses: https://github.com/docker/metadata-action@v6
       with:
         images: git.nadeko.net/fijxu/file-uploader-crystal
         tags: |
           type=sha,format=short,prefix={{date 'YYYY.MM.DD'}}-,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
           type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
 
-    - uses: https://code.forgejo.org/docker/build-push-action@v5
+    - uses: https://code.forgejo.org/docker/build-push-action@v6
       name: Build images
       with:
         context: .
@@ -43,5 +42,5 @@ jobs:
         tags: ${{ steps.meta.outputs.tags }}
         platforms: linux/amd64
         push: true
-        build-args: |
-          "release=1"
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
diff --git a/Dockerfile b/Dockerfile
index 3e06b49..fe2ccc2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,10 @@
 # Based on https://github.com/iv-org/invidious/blob/master/docker/Dockerfile
-FROM crystallang/crystal:1.14.0-alpine AS builder
+FROM crystallang/crystal:1.16.1-alpine AS builder
 
 RUN apk add --no-cache sqlite-static yaml-static
 
-ARG release
+WORKDIR /file-uploader-crystal
 
-WORKDIR /file-uploader-crystal 
 COPY ./shard.yml ./shard.yml
 COPY ./shard.lock ./shard.lock
 RUN shards install --production
@@ -15,21 +14,29 @@ COPY ./src/ ./src/
 # See definition of CURRENT_BRANCH, CURRENT_COMMIT and CURRENT_VERSION.
 COPY ./.git/ ./.git/
 
-RUN crystal build ./src/file-uploader-crystal.cr \
+RUN --mount=type=cache,target=/root/.cache/crystal \
+	crystal build ./src/file-uploader-crystal.cr \
 	--release \
 	--static --warnings all
 
-FROM alpine:3.20
+# 2nd stage
+FROM alpine:3.21
 RUN apk add --no-cache tini ffmpeg
+
 WORKDIR /file-uploader-crystal
+
 RUN addgroup -g 1000 -S file-uploader-crystal && \
 	adduser -u 1000 -S file-uploader-crystal -G file-uploader-crystal
-COPY --chown=file-uploader-crystal ./config/config.* ./config/
+
+COPY --chown=file-uploader-crystal ./config/config.example.yml ./config/
 RUN mv -n config/config.example.yml config/config.yml
-COPY --from=builder /file-uploader-crystal/file-uploader-crystal .
-RUN chmod o+rX -R ./config 
+COPY --from=builder /file-uploader-crystal/file-uploader-crystal /file-uploader-crystal
+RUN chmod o+rX -R /file-uploader-crystal/file-uploader-crystal
+RUN chown file-uploader-crystal: -R /file-uploader-crystal
 
 EXPOSE 8080
 USER file-uploader-crystal
+
 ENTRYPOINT ["/sbin/tini", "--"]
+
 CMD [ "/file-uploader-crystal/file-uploader-crystal" ]