Remove our copy of the wait-for-it script (cvat-ai#8572)

Nowadays it's available from the Ubuntu repositories, so install it from
there. This declutters our root directory a bit, plus it makes
enumerating 3rd-party dependencies easier.

Dockerfile

@@ -134,6 +134,7 @@ RUN apt-get update && \
         supervisor \
         tzdata \
         unrar \
+        wait-for-it \
     && ln -fs /usr/share/zoneinfo/${TZ} /etc/localtime && \
     dpkg-reconfigure -f noninteractive tzdata && \
     rm -rf /var/lib/apt/lists/* && \
@@ -192,7 +193,7 @@ RUN python -m pip uninstall -y pip
 COPY cvat/nginx.conf /etc/nginx/nginx.conf
 COPY --chown=${USER} components /tmp/components
 COPY --chown=${USER} supervisord/ ${HOME}/supervisord
-COPY --chown=${USER} wait-for-it.sh manage.py backend_entrypoint.sh wait_for_deps.sh ${HOME}/
+COPY --chown=${USER} manage.py backend_entrypoint.sh wait_for_deps.sh ${HOME}/
 COPY --chown=${USER} utils/ ${HOME}/utils
 COPY --chown=${USER} cvat/ ${HOME}/cvat
 COPY --chown=${USER} rqscheduler.py ${HOME}

backend_entrypoint.sh

@@ -8,7 +8,7 @@ fail() {
 }
 
 wait_for_db() {
-    ~/wait-for-it.sh "${CVAT_POSTGRES_HOST}:${CVAT_POSTGRES_PORT:-5432}" -t 0
+    wait-for-it "${CVAT_POSTGRES_HOST}:${CVAT_POSTGRES_PORT:-5432}" -t 0
 }
 
 cmd_bash() {
@@ -19,7 +19,7 @@ cmd_init() {
     wait_for_db
     ~/manage.py migrate
 
-    ~/wait-for-it.sh "${CVAT_REDIS_INMEM_HOST}:${CVAT_REDIS_INMEM_PORT:-6379}" -t 0
+    wait-for-it "${CVAT_REDIS_INMEM_HOST}:${CVAT_REDIS_INMEM_PORT:-6379}" -t 0
     ~/manage.py syncperiodicjobs
 }
 

wait_for_deps.sh

@@ -11,8 +11,8 @@
 # but it's too resource-intensive to execute for every worker we might be running
 # in a container. Instead, it's in backend_entrypoint.sh.
 
-~/wait-for-it.sh "${CVAT_POSTGRES_HOST}:${CVAT_POSTGRES_PORT:-5432}" -t 0
-~/wait-for-it.sh "${CVAT_REDIS_INMEM_HOST}:${CVAT_REDIS_INMEM_PORT}" -t 0
-~/wait-for-it.sh "${CVAT_REDIS_ONDISK_HOST}:${CVAT_REDIS_ONDISK_PORT}" -t 0
+wait-for-it "${CVAT_POSTGRES_HOST}:${CVAT_POSTGRES_PORT:-5432}" -t 0
+wait-for-it "${CVAT_REDIS_INMEM_HOST}:${CVAT_REDIS_INMEM_PORT}" -t 0
+wait-for-it "${CVAT_REDIS_ONDISK_HOST}:${CVAT_REDIS_ONDISK_PORT}" -t 0
 
 exec "$@"