fix: Use absolute paths for workdirs (#75)

Author: limakzi

src/dockerfiles/ubuntu-2204-lts/Dockerfile

@@ -80,7 +80,7 @@ WORKDIR ${GAP_USER_HOMEDIR}
 ADD --chown=${GAP_USER_USERNAME}:${GAP_USER_GROUPNAME} ${GAP_CORE_DOWNLOAD_URL} ./
 RUN tar -xzf ${GAP_CORE_TARBALL_NAME}
 
-WORKDIR "./gap-${GAP_VERSION}"
+WORKDIR "${GAP_USER_HOMEDIR}/gap-${GAP_VERSION}"
 RUN ./configure && MAKEFLAGS=-j8 make
 
 FROM base AS bare
@@ -159,7 +159,7 @@ WORKDIR ${GAP_USER_HOMEDIR}
 ADD --chown=${GAP_USER_USERNAME}:${GAP_USER_GROUPNAME} ${GAP_DOWNLOAD_URL} ./
 RUN tar -xzf ${GAP_TARBALL_NAME}
 
-WORKDIR "./gap-${GAP_VERSION}"
+WORKDIR "${GAP_USER_HOMEDIR}/gap-${GAP_VERSION}"
 RUN ./configure && MAKEFLAGS=-j8 make
 
 FROM buildslim AS buildfull