update helm chart + development machine instructions

Development.md

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+# Development setup
+
+## Install kubectl on client machine
+
+See [installation tutorial here](https://kubernetes.io/docs/tasks/tools/install-kubectl-linux/)
+
+## Install helm on client machine
+
+See [installation tutorial here](https://helm.sh/docs/intro/install/)
+
+## Configure cluster with kubectl
+
+- Get cluster info with command `microk8s config`
+- Add the cluster info to the kubectl config file on the client machine at `~/.kube/config`
+
+Example config file
+
+```bash
+apiVersion: v1 
+clusters: 
+- cluster:  
+    certificate-authority-data: 
+    ......
+      server: https://63.250.54.81:16443  
+  name: homeserver  
+contexts:  
+- context:  
+    cluster: homeserver 
+    user: admin  
+  name: homeserver 
+current-context: homeserver 
+kind: Config  
+preferences: {}  
+users:  
+- name: admin  
+  user:  
+    token: TnNDNURIV1I3RFdFMFora1NEaTdlNi9uNEgwR0pHRVRVajdPeFFrYWUvND0K  
+```
+
+- In config file above, change context name
+- To use this cluster with kubectl, enter `kubectl config use-context homeserver`
+
+## Configure cluster with helm
+
+- Run `helm --kube-context homeserver`

helm/Chart.yaml

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+name: homeautomation
+version: 0.0.1

helm/README.md

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+# Helm
+
+This folder contains the helm template for my home automation setup.

helm/templates/MQTT/pvc.yml

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+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: mosquitto-pvc
+spec:
+  accessModes:
+  - ReadWriteOnce
+  storageClassName: microk8s-hostpath
+  resources:
+    requests:
+      storage: 1Gi
+

helm/templates/MQTT/statefulset.yml

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+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: mosquitto
+spec:
+  serviceName: mosquitto
+  selector:
+    matchLabels:
+      app: mosquitto
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: mosquitto
+    spec:
+      containers:
+        - name: mosquitto
+          image: eclipse-mosquitto
+          imagePullPolicy: "IfNotPresent"
+          ports:
+            - containerPort: 5432
+          volumeMounts:
+          - name: mosquitto-data
+            mountPath: /mosquitto/data
+      volumes:
+      - name: mosquitto-data
+        persistentVolumeClaim:
+          claimName: mosquitto-pvc