verify checksum and set up workdir

Author: Faizal-Eeman

Diff for: Dockerfile

@@ -50,27 +50,37 @@ COPY battenberg_bl_custom.R /usr/local/src/
 COPY battenberg_wgs_bl_custom.R /usr/local/src/
 
 ARG ASCAT_VERSION
+ARG ASCAT_SHA512="a60e75405c3999c86d19e20d717eee9d1e1915e647e2626be5b5bb0d266a6f96535d9cd21ee7717d6fb04d4f76a5b78a1b45e3315bf823e480a8e27afdec364b"
 ARG BATTENBERG_VERSION
+ARG BATTENBERG_SHA512="a4784ca3e6523bd47b5a6d86c1e7ef5f0023371bd0b5bf3685440e3336333cddf3937f768910462c98eb5cb8b5cfd2c63db052c3186a3b1f0363e460ace521d4"
+
+WORKDIR /usr/local/src/
 
 RUN set -eux && \
     # Ignore specific packages from `renv.lock` file
     R -q -e 'renv::settings$ignored.packages(c("ASCAT", "Battenberg"))' && \
     R -q -e 'renv::restore(lockfile = "/usr/local/renv.lock")' && \
     # Install ASCAT
-    cd /usr/local/src/ && \
     wget -q -O ascat-${ASCAT_VERSION}.tar.gz \
         https://github.com/VanLoo-lab/ascat/archive/refs/tags/v${ASCAT_VERSION}.tar.gz && \
+    if echo "$ASCAT_SHA512" ascat-${ASCAT_VERSION}.tar.gz | sha512sum -c --quiet; \
+    then echo "ASCAT SHA512 checksum verified successfully!"; \
+    else echo "ASCAT SHA512 checksum verification failed. Downloaded file checksum does not match the SHA512 hash."; exit 1; \
+    fi && \
     tar -xzf ascat-${ASCAT_VERSION}.tar.gz && \
     R CMD INSTALL ascat-${ASCAT_VERSION}/ASCAT/ && \
     # Instal Battenberg
     wget -q -O battenberg-${BATTENBERG_VERSION}.tar.gz \
         https://github.com/Wedge-lab/battenberg/archive/refs/tags/v${BATTENBERG_VERSION}.tar.gz && \
+    if echo "$BATTENBERG_SHA512" battenberg-${BATTENBERG_VERSION}.tar.gz | sha512sum -c --quiet; \
+    then echo "Battenberg SHA512 checksum verified successfully!"; \
+    else echo "Battenberg SHA512 checksum verification failed. Downloaded file checksum does not match the SHA512 hash."; exit 1; \
+    fi && \
     tar -xzf battenberg-${BATTENBERG_VERSION}.tar.gz && \
     cp battenberg_bl_custom.R battenberg-${BATTENBERG_VERSION}/R/battenberg.R && \
     cp battenberg_wgs_bl_custom.R battenberg-${BATTENBERG_VERSION}/inst/example/battenberg_wgs.R && \
     R CMD INSTALL battenberg-${BATTENBERG_VERSION}/ && \
     # Cleanup
-    cd /usr/local/ && \
     rm -rf /usr/local/src/*
 
 # Add a new user/group called bldocker