Added bash file which installs necessary packages onto docker container

docker/build/getPINNTraining.sh

@@ -0,0 +1,56 @@
+
+echo "PINNTraining Docker Container"
+usage="$(basename "$0") [-h] [-b branch_name]
+where:
+    -h  show this help text
+    -b  branch name (if not given, existing PINNTraining directory must be mounted in /src/PINNTraining).
+
+Compiled binaries can be found at /install/. Mount that directory for access.
+Note: If you specify a working directory using the --workdir option for docker,
+      append this directory to all paths above (e.g. use --workdir=/tmp if running in user mode)."
+
+flags=""
+branch=""
+workdir=$PWD
+
+export CCACHE_DIR=$workdir/ccache
+
+if [ "$#" -ne 0 ]; then
+  while [ "$(echo $1 | cut -c1)" = "-" ]
+    do
+        case "$1" in
+                ;;
+            -b)
+                    branch=$2
+                    shift 2
+                ;;
+            *)
+                    echo "$usage" >&2
+                    exit 1
+                ;;
+    esac
+    done
+fi
+
+
+if [ ! -z "$branch" ]; then
+  name="PINNTraining_$(echo $branch | sed 's/\//_/g')"
+  echo "Branch provided. Cloning to $PWD/src/$name"
+  if [ ! -d "src" ]; then
+    mkdir "src"
+  fi
+  cd "src"
+  git clone --recursive https://github.com/EvertBunschoten/PINNTraining $name
+  cd $name
+  git config --add remote.origin.fetch '+refs/pull/*/merge:refs/remotes/origin/refs/pull/*/merge'
+  git config --add remote.origin.fetch '+refs/heads/*:refs/remotes/origin/refs/heads/*'
+  git fetch origin
+  git checkout $branch
+  git submodule update
+else
+  if [ ! -d "src/PINNTraining" ]; then
+    echo "PINNTraining source directory not found. Make sure to mount existing PINNTraining at directory at /src/PINNTraining. Otherwise use -b to provide a branch."
+    exit 1
+  fi
+  cd src/PINNTraining
+fi