feat: ✨ add tzdata to Dockerfile for timezone config

You can now set your timezone with the environment variable
`TZ="Europe/Berlin"`

Dockerfile

@@ -7,7 +7,8 @@ apk add \
 bash \
 curl \
 jq \
-bind-tools
+bind-tools \
+tzdata
 
 WORKDIR /usr/src/app
 

README.md

@@ -155,17 +155,15 @@ services:
     image: ev21/dynb
     container_name: dynb
     network_mode: host
-    build:
-      context: .
-      dockerfile: ./Dockerfile
     environment:
       - DYNB_DYN_DOMAIN=dyndns.example.com
-      - DYNB_SERVICE_PROVIDER=inwx
+      - DYNB_SERVICE_PROVIDER=desec
       - DYNB_UPDATE_METHOD=dyndns
       - DYNB_IP_MODE=64
       - DYNB_USERNAME=User42
       - DYNB_PASSWORD=SuperSecretPassword
       - DYNB_INTERVAL=60
+      - TZ=Europe/Berlin
 ```
 
 ## environment variables

dynb.sh

@@ -66,7 +66,7 @@ _response=
 _statusHostname=
 _statusUsername=
 _statusPassword=
-_version=0.3.0
+_version=0.3.2
 _userAgent="DynB/$_version github.com/EV21/dynb"
 _configFile=$HOME/.local/share/dynb/.env
 _statusFile=/tmp/dynb.status
@@ -209,17 +209,12 @@ function getRemoteIP
 {
   local ip_version=$1
   local ip_check_server=$2
-  if [[ -n $_DNS_checkServer ]]
-  then
-    curl --silent "$_interface_str" --user-agent "$_userAgent" \
-      --ipv"${ip_version}" --dns-servers "$_DNS_checkServer" --location "${ip_check_server}"
-  else
-    curl --silent "$_interface_str" --user-agent "$_userAgent" \
-      --ipv"${ip_version}" --location "${ip_check_server}"
-  fi
+  curl --silent "$_interface_str" --user-agent "$_userAgent" \
+    --ipv"${ip_version}" --location "${ip_check_server}"
+  local curls_status_code=$?
   # shellcheck disable=2181
-  if [[ $? -gt 0 ]]; then
-    errorMessage "IPCheck (getRemoteIP ${1}) request failed"
+  if [[ $curls_status_code -gt 0 ]]; then
+    errorMessage "IPCheck (getRemoteIP $ip_version) request failed"
     exit 1
   fi
 }
@@ -817,6 +812,7 @@ function main
     while : 
     do
       doUpdates
+      debugMessage "wait $DYNB_INTERVAL seconds until next check"
       sleep $DYNB_INTERVAL
     done
   else doUpdates