add docker build and instructions

Dockerfile

@@ -0,0 +1,26 @@
+FROM ubuntu:22.04 AS build-prep
+RUN apt update && apt upgrade -y
+RUN apt install -y llvm clangd meson ninja-build pkg-config libsqlite3-dev doxygen graphviz wget unzip
+WORKDIR /obelisk
+COPY . .
+RUN ./sqlite.sh
+
+FROM build-prep AS build-machine
+RUN meson --prefix=/usr build
+RUN cd build && ninja -v
+
+FROM build-machine AS build-machine-intermediate
+RUN cd /obelisk/build/src/lib && rm -rf *.h *.p models
+
+FROM scratch AS obelisk
+COPY --from=build-machine-intermediate /obelisk/build/src /bin/
+COPY --from=build-machine-intermediate /obelisk/build/src/lib /lib/
+COPY --from=build-machine-intermediate /obelisk/build/doc/man /man/
+COPY --from=build-machine-intermediate /obelisk/build/doc/html /doc/
+ENTRYPOINT [ "/bin/obelisk" ]
+
+FROM scratch AS binaries
+COPY --from=obelisk /bin/obelisk /bin/
+COPY --from=obelisk /lib /lib/
+COPY --from=obelisk /man /man/
+COPY --from=obelisk /doc /doc/