Pin Dockerfile Ubuntu version.

Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:latest as build
+FROM ubuntu:22.04 as build
 WORKDIR /app
 
 # Update the system and install various dependencies
@@ -21,7 +21,7 @@ RUN mkdir build/
 RUN cd build && cmake -DCMAKE_TOOLCHAIN_FILE=vcpkg/scripts/buildsystems/vcpkg.cmake ..
 RUN cd build && make -j $(nproc)
 
-FROM ubuntu:latest as app
+FROM ubuntu:22.04 as app
 WORKDIR /app
 
 RUN apt-get update && apt-get install -y python2 libdevil-dev libbsd-dev && apt-get clean