diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index 4ea82a7..f4f3a27 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -107,18 +107,18 @@ jobs:
 
           echo "${TOKEN}" | docker login git.dvv.one -u "${USERNAME}" --password-stdin
 
-          cat > Dockerfile.relay <<EOF
-FROM debian:bookworm-slim
-COPY target/release/relay /usr/local/bin/relay
-EXPOSE 7000 7001 25565
-ENTRYPOINT ["/usr/local/bin/relay"]
-EOF
+          printf '%s\n' \
+            'FROM debian:bookworm-slim' \
+            'COPY target/release/relay /usr/local/bin/relay' \
+            'EXPOSE 7000 7001 25565' \
+            'ENTRYPOINT ["/usr/local/bin/relay"]' \
+            > Dockerfile.relay
 
-          cat > Dockerfile.client <<EOF
-FROM debian:bookworm-slim
-COPY target/release/client /usr/local/bin/client
-ENTRYPOINT ["/usr/local/bin/client"]
-EOF
+          printf '%s\n' \
+            'FROM debian:bookworm-slim' \
+            'COPY target/release/client /usr/local/bin/client' \
+            'ENTRYPOINT ["/usr/local/bin/client"]' \
+            > Dockerfile.client
 
           docker build -f Dockerfile.relay -t ${IMAGE_BASE}/relay:${VERSION} .
           docker build -f Dockerfile.client -t ${IMAGE_BASE}/client:${VERSION} .
@@ -143,10 +143,10 @@ EOF
         if: startsWith(github.ref, 'refs/tags/')
         run: |
           mkdir -p ~/.cargo
-          cat > ~/.cargo/config.toml <<EOF
-[registries.gitea]
-index = "sparse+${GITHUB_SERVER_URL}/api/packages/${OWNER}/cargo/"
-EOF
+          printf '%s\n' \
+            '[registries.gitea]' \
+            "index = \"sparse+${GITHUB_SERVER_URL}/api/packages/${OWNER}/cargo/\"" \
+            > ~/.cargo/config.toml
 
       - name: Publish Cargo packages
         if: startsWith(github.ref, 'refs/tags/')
@@ -195,4 +195,4 @@ EOF
               -H "Authorization: token ${TOKEN}" \
               -F "attachment=@${file}" \
               "${GITHUB_SERVER_URL}/api/v1/repos/${OWNER}/${REPO}/releases/${release_id}/assets?name=${name}"
-          done
\ No newline at end of file
+          done
diff --git a/.yamllint b/.yamllint
new file mode 100644
index 0000000..576af8c
--- /dev/null
+++ b/.yamllint
@@ -0,0 +1,8 @@
+extends: default
+
+rules:
+  document-start: disable
+  line-length: disable
+  truthy:
+    allowed-values: ['true', 'false', 'on', 'off']
+    check-keys: true