Release 0.3.0

Summary

Insert a meaningful description for this merge request here: What is the new/changed behavior? Which bug has been fixed? Are there related issues?

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Test Environment

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• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
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• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
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• In-code documentation and comments are up-to-date.
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.docker/Dockerfile

@@ -5,21 +5,19 @@ COPY .docker/wait-for-it.sh /wait-for-it.sh
 
 # build and install caosdb-cpplib
 WORKDIR /libcaosdb/
-RUN mkdir build
-WORKDIR /libcaosdb/build
-RUN conan create -s "compiler.libcxx=libstdc++11" -o caosdb:build_acm=True .. "caosdb/$(conan inspect --raw version ..)@_/_"
+RUN conan profile detect -f
+RUN make conan
 
 COPY . /caosdb-cppinttest
 WORKDIR /caosdb-cppinttest
 RUN rm -rf .git
 
 COPY .docker/caosdb-client.json /caosdb-client.json
+COPY .docker/linkahead-client.json /linkahead-client.json
 
-# build and run tests
-CMD mkdir build && \
-    cd build && \
-    conan install .. -s "compiler.libcxx=libstdc++11" && \
-    cmake .. && \
-    cmake --build . && \
+# Build and run tests.
+# If no other command is given to the Docker image
+CMD make build-release &&\
+    cd build/Release &&\
     /wait-for-it.sh caosdb-server:10443 -t 500 -- \
     ctest -V