diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
new file mode 100644
index 0000000..359274b
--- /dev/null
+++ b/.github/workflows/docker.yml
@@ -0,0 +1,18 @@
+---
+name: docker
+
+on:
+  # publish on releases, e.g. v2.1.13 (image tagged as "2.1.13" - "v" prefix is removed)
+  release:
+    types:
+      - published
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: macbre/push-to-ghcr@master
+        with:
+          image_name: ${{ github.repository }}
+          github_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/Dockerfile b/Dockerfile
index 65ef561..61daf09 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -25,7 +25,6 @@ RUN mkdir /data && cp /build/deploy/cortex-tenant.yml /data/cortex-tenant.yml
 
 FROM scratch
 
-ENV CONFIG_FILE /data/cortex-tenant.yml
 COPY --chown=65534:0 --from=builder /dist /
 
 COPY --chown=65534:0 --from=builder /data /data
@@ -35,4 +34,4 @@ WORKDIR /data
 
 COPY --from=alpine:latest /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 ENTRYPOINT ["/cortex-tenant"]
-CMD ["-config", "$CONFIG_FILE"]
+CMD ["-config", "/data/cortex-tenant.yml"]
diff --git a/README.md b/README.md
index 484204d..366f1b7 100644
--- a/README.md
+++ b/README.md
@@ -113,22 +113,19 @@ If you want `deb` or `rpm` packages then install [FPM](https://fpm.readthedocs.i
 
 ## Containerization
 
-To use the current container you need to overwrite the default configuration file. The Docker file uses a environment called `CONFIG_FILE` with the following value: `ENV CONFIG_FILE cortex-tenant.yml`.
-This file get written to the workdir `/data`.
+To use the current container you need to overwrite the default configuration file, mount your configuration into to `/data/cortex-tenant.yml`.
 
-You can overwrite the default config by starting the container with
+You can overwrite the default config by starting the container with:
 
 ```bash
 docker container run \
 -v <CONFIG_LOCATION>:/data/cortex-tenant.yml \
-vincentfree/cortex-tenant:1.3.3
+ghcr.io/blind-oracle/cortex-tenant:1.6.1
 ```
 
-You can also write it to your prefered location and update the environment variable like this
+... or build your own Docker image:
 
-```bash
-docker container run \
--e CONFIG_FILE=/data/config.yml \
--v <CONFIG_LOCATION>:/data/config.yml \
-vincentfree/cortex-tenant:1.3.3
+```Dockerfile
+FROM ghcr.io/blind-oracle/cortex-tenant:1.6.1
+ADD my-config.yml /data/cortex-tenant.yml
 ```