Add image for open62541 build

.gitlab-ci.yml

@@ -7,7 +7,9 @@ build:
     - docker image build -t registry.git.rwth-aachen.de/acplt/build-docker-image/build-essential build-essential
     - docker image build -t registry.git.rwth-aachen.de/acplt/build-docker-image/rte-build rte-build
     - docker image build -t registry.git.rwth-aachen.de/acplt/build-docker-image/rte-crossbuild rte-crossbuild
+    - docker image build -t registry.git.rwth-aachen.de/acplt/build-docker-image/open62541-build open62541-build
     - docker push registry.git.rwth-aachen.de/acplt/build-docker-image/build-essential
     - docker push registry.git.rwth-aachen.de/acplt/build-docker-image/rte-build
     - docker push registry.git.rwth-aachen.de/acplt/build-docker-image/rte-crossbuild
+    - docker push registry.git.rwth-aachen.de/acplt/build-docker-image/open62541-build
     - docker logout $CI_REGISTRY

open62541-build/Dockerfile

+FROM registry.git.rwth-aachen.de/acplt/build-docker-image/build-essential
+
+RUN apt-get update -qq && apt-get install -y -qq --no-install-recommends python3 && rm -rf /var/lib/apt/lists/*