add Dockerfile

.docker/Dockerfile

@@ -0,0 +1,58 @@
+FROM ubuntu:20.04
+
+WORKDIR /tmp
+
+ARG DEBIAN_FRONTEND=noninteractive
+ARG EMSCRIPTEN=/tmp/emsdk/upstream/emscripten
+
+RUN apt update \
+    && apt-get install -y \
+        build-essential \
+        cmake pkg-config \
+        libssl-dev \
+        libzmq3-dev \
+        libsodium-dev \
+        libunwind8-dev \
+        liblzma-dev \
+        libreadline6-dev \
+        libpgm-dev \
+        qttools5-dev-tools \
+        libhidapi-dev \
+        libusb-1.0-0-dev \
+        libprotobuf-dev \
+        protobuf-compiler \
+        libudev-dev \
+        python3 \
+        ccache \
+        libexpat1-dev \
+        bison \
+        flex \
+        wget \
+        git
+
+WORKDIR /root/
+
+RUN wget https://github.com/libexpat/libexpat/releases/download/R_2_4_8/expat-2.4.8.tar.bz2 \
+    && tar -xf expat-2.4.8.tar.bz2 \
+    && rm expat-2.4.8.tar.bz2 \
+    && cd expat-2.4.8 \
+    && ./configure --enable-static --disable-shared \
+    && make \
+    && make install
+
+RUN wget https://www.nlnetlabs.nl/downloads/unbound/unbound-1.17.0.tar.gz \
+    && tar xzf unbound-1.17.0.tar.gz \
+    && cd unbound-1.17.0 \
+    && ./configure --with-libexpat=/usr --with-ssl=/usr \
+    && make \
+    && make install
+
+WORKDIR /tmp
+COPY . .
+
+
+
+RUN cd emsdk \
+  && . ./emsdk_env.sh \
+  && cd .. \
+  && ./bin/build_ci.sh