compose: add build args and remove defaults

- repository and hashes
- bitcoin version and sha256sums hash
Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

txood/Dockerfile

@@ -9,8 +9,8 @@ RUN apk update && \
     rust \
     cargo
 
-ARG TXOO_GIT_HASH=1cfeecf5f806a04a12c97ca17c39566a1a24e732
-ARG TXOO_REPO=https://gitlab.com/lightning-signer/txoo.git
+ARG TXOO_GIT_HASH \
+    TXOO_REPO
 RUN git clone --recurse-submodules $TXOO_REPO
 RUN cd txoo && \
     git checkout $TXOO_GIT_HASH && \