Fix CI, add rules to only run on installer branch

.gitlab-ci.yml

@@ -8,6 +8,8 @@ variables:
 build_glibc:
     stage: build
     image: rust:bullseye
+    rules:
+      - if: $CI_COMMIT_BRANCH == "installer"
     script:
         - cargo build --release
         - cp target/release/dotfiles_installer ./installer-amd64-glibc
@@ -18,8 +20,10 @@ build_glibc:
 build_muslc:
     stage: build
     image: rust:alpine
+    rules:
+      - if: $CI_COMMIT_BRANCH == "installer"
     script:
-        - apk add pkgconf musl-dev
+        - apk add pkgconf musl-dev openssl-dev
         - cargo build --release
         - cp target/release/dotfiles_installer ./installer-amd64-muslc
     artifacts:
@@ -30,6 +34,8 @@ build_muslc:
 upload_assets:
     stage: release
     image: curlimages/curl:latest
+    rules:
+      - if: $CI_COMMIT_BRANCH == "installer"
     needs:
         - job: build_glibc
           artifacts: true
@@ -42,6 +48,8 @@ upload_assets:
 create_release:
     stage: release
     image: registry.gitlab.com/gitlab-org/release-cli:latest
+    rules:
+      - if: $CI_COMMIT_BRANCH == "installer"
     needs:
         - upload_assets
     script: