Handle config changes on docker updates

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.13.10-alpine AS builder
+FROM golang:1.15.6-alpine AS builder
 
 RUN apk --no-cache add gcc musl-dev
 
@@ -7,11 +7,9 @@ COPY . ${GOPATH}/src/github.com/mcuadros/ofelia
 
 RUN go build -o /go/bin/ofelia .
 
-FROM alpine:3.11
+FROM alpine:3.12
 
-# this label is required to identify container with ofelia running
 LABEL ofelia.service=true
-LABEL ofelia.enabled=true
 
 RUN apk --no-cache add ca-certificates tzdata
 

README.md

@@ -65,8 +65,6 @@ In order to use this type of configurations, ofelia need access to docker socket
 ```sh
 docker run -it --rm \
     -v /var/run/docker.sock:/var/run/docker.sock:ro \
-    --label ofelia.job-local.my-test-job.schedule="@every 5s" \
-    --label ofelia.job-local.my-test-job.command="date" \
         mcuadros/ofelia:latest daemon --docker
 ```
 
@@ -86,9 +84,8 @@ docker run -it --rm \
         nginx
 ```
 
-Now if we start `ofelia` container with the command provided above, it will pickup 2 jobs:
+Now if we start `ofelia` container with the command provided above, it will execute the task:
 
-- Local - `date`
 - Exec  - `uname -a`
 
 Or with docker-compose:
@@ -103,9 +100,6 @@ services:
     command: daemon --docker
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock:ro
-    labels:
-      ofelia.job-local.my-test-job.schedule: "@every 5s"
-      ofelia.job-local.my-test-job.command: "date"
 
   nginx:
     image: nginx
@@ -115,6 +109,42 @@ services:
       ofelia.job-exec.datecron.command: "uname -a"
 ```
 
+#### Dynamic docker configuration
+
+You can start ofelia in its own container or on the host itself, and it will magically pick up any container that starts, stops or is modified on the fly.
+In order to achieve this, you simply have to use docker containers with the labels described above and let ofelia take care of the rest. 
+
+#### Hybrid configuration (INI files + Docker)
+
+You can specify part of the configuration on the INI files, such as globals for the middlewares or even declare tasks in there but also merge them with docker.
+The docker labels will be parsed, added and removed on the fly but also, the file config can be used. 
+
+**Use the INI file to:**
+
+- Configure the slack or other middleware integration
+- Configure any global setting
+- Create a job-run so it executes on a new container each time
+
+```ini
+[global]
+slack-webhook = https://myhook.com/auth
+
+[job-run "job-executed-on-new-container"]
+schedule = @hourly
+image = ubuntu:latest
+command = touch /tmp/example
+```
+
+**Use docker to:**
+
+```sh
+docker run -it --rm \
+    --label ofelia.enabled=true \
+    --label ofelia.job-exec.test-exec-job.schedule="@every 5s" \
+    --label ofelia.job-exec.test-exec-job.command="uname -a" \
+        nginx
+```
+
 ### Logging
 **Ofelia** comes with three different logging drivers that can be configured in the `[global]` section:
 - `mail` to send mails