docker: Set timezone in TZ env var.

docker/.env

@@ -1,2 +1,3 @@
 HTML_PORT=127.0.0.1:12700:12700
 #COINDATA_PATH=/var/data/coinswaps
+TZ=UTC

docker/docker-compose.yml

@@ -10,6 +10,8 @@ services:
             - ${COINDATA_PATH}:/coindata
         ports:
             - "${HTML_PORT}"  # Expose only to localhost, see .env
+        environment:
+            - TZ
 
 volumes:
   coindata:

docker/production/.env

@@ -1 +1,2 @@
 HTML_PORT=127.0.0.1:12700:12700
+TZ=UTC

docker/production/docker-compose.yml

@@ -61,6 +61,8 @@ services:
             - /var/swapdata/swapclient:/data
         ports:
             - "${HTML_PORT}"  # Expose only to localhost, see .env
+        environment:
+            - TZ
         depends_on:
             - particl_core
         restart: unless-stopped

docker/production/swapclient/Dockerfile

@@ -5,7 +5,7 @@ ENV LANG=C.UTF-8 \
     DATADIR=/data
 
 RUN apt-get update; \
-    apt-get install -y wget python3-pip gnupg unzip protobuf-compiler automake libtool pkg-config gosu;
+    apt-get install -y wget python3-pip gnupg unzip protobuf-compiler automake libtool pkg-config gosu tzdata;
 
 RUN wget -O coincurve-anonswap.zip https://github.com/tecnovert/coincurve/archive/anonswap.zip && \
     unzip coincurve-anonswap.zip && \