txoo: connect to vls and cln

- set env var for vls frontend
- set arg for vlsd2
- create txoo-server service
- cln uses http source
- vls fetch public key using curl with retries fail if not set
- update README for vls standalone
Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

vlsd/Dockerfile

@@ -28,6 +28,8 @@ ARG VLSD_UID=100 \
     VLSD_GID=101 \
     VLSD_USER=vls
 ARG VLSD_HOME=/home/${VLSD_USER}
+ARG TXOO_PUBLIC_KEY
+ENV TXOO_PUBLIC_KEY=${TXOO_PUBLIC_KEY}
 
 LABEL maintainer.0="Lakshya Singh (@king-11)" \
   maintainer.1="Dev Random (@devrandom01)"
@@ -39,6 +41,7 @@ RUN apk update && \
   apk add \
   build-base \
   curl-dev \
+  curl \
   protobuf \
   bind-tools \
   tini
@@ -58,6 +61,8 @@ ENV VLSD_DATA=/home/vls/.lightning-signer
 RUN mkdir -p ${VLSD_DATA} && \
     chown ${VLSD_USER}:${VLSD_USER} ${VLSD_DATA}
 
+RUN mkdir -p ${VLSD_HOME}/.txoo
+
 ENV REMOTE_SIGNER_ALLOWLIST=${VLSD_DATA}/ALLOWLIST
 RUN touch ${REMOTE_SIGNER_ALLOWLIST}