fix: Start ctt server as default application in docker container

The container can be built with:
`docker build -t open62541 . && docker run -p 4840:4840 open62541`

.dockerignore

@@ -0,0 +1,2 @@
+Dockerfile
+/build/*

Dockerfile

@@ -1,10 +1,29 @@
-FROM alpine:3.5
-RUN apk add --no-cache cmake gcc g++ musl-dev python py-pip make && rm -rf /var/cache/apk/*
-ADD . /tmp/open62541
-WORKDIR /tmp/open62541/build
-RUN cmake -DUA_ENABLE_AMALGAMATION=true  \
-          -DBUILD_SHARED_LIBS=true \
-          /tmp/open62541 
+FROM alpine:3.10
+RUN apk add --no-cache cmake gcc git g++ musl-dev mbedtls-dev python py-pip make && rm -rf /var/cache/apk/*
+ADD . /opt/open62541
+WORKDIR /opt/open62541
+RUN git submodule update --init --recursive
+WORKDIR /opt/open62541/build
+RUN cmake -DBUILD_SHARED_LIBS=ON \
+		-DCMAKE_BUILD_TYPE=Debug \
+		-DUA_BUILD_EXAMPLES=ON \
+		# Hardening needs to be disabled, otherwise the docker build takes too long and travis fails
+		-DUA_ENABLE_HARDENING=OFF \
+        -DUA_ENABLE_ENCRYPTION=ON \
+        -DUA_ENABLE_SUBSCRIPTIONS=ON \
+        -DUA_ENABLE_SUBSCRIPTIONS_EVENTS=ON \
+		-DUA_NAMESPACE_ZERO=FULL \
+         /opt/open62541
 RUN make -j
-RUN cp *.h /usr/include/ && \
-    cp bin/*.so /usr/lib
+RUN make install
+
+# Generate certificates
+RUN apk add --no-cache python-dev linux-headers openssl && rm -rf /var/cache/apk/*
+RUN pip install netifaces==0.10.9
+RUN mkdir -p /opt/open62541/pki/created
+RUN python /opt/open62541/tools/certs/create_self-signed.py /opt/open62541/pki/created
+
+
+WORKDIR /opt/open62541
+EXPOSE 4840
+CMD ["/opt/open62541/build/bin/examples/server_ctt" , "/opt/open62541/pki/created/server_cert.der", "/opt/open62541/pki/created/server_key.der", "--enableUnencrypted", "--enableAnonymous"]

tools/travis/travis_linux_script.sh

@@ -29,7 +29,7 @@ fi
 # Docker build test
 if ! [ -z ${DOCKER+x} ]; then
     docker build -t open62541 .
-    docker run -d -p 127.0.0.1:80:80 --name open62541 open62541 /bin/sh
+    docker run -d -p 127.0.0.1:4840:4840 --name open62541 open62541 /bin/sh
     docker ps | grep -q open62541
     # disabled since it randomly fails
     # docker ps | grep -q open62541