Add curl to Dockerfile

base image does not contain any packages. Need to add curl
to be able to pull in the watchdog binary

Signed-off-by: Burton Rheutan <rheutan7@gmail.com>

Author: burtonr

template/powershell-http/Dockerfile

@@ -1,8 +1,11 @@
 FROM microsoft/powershell:ubuntu-xenial
 
-RUN curl -sSLf https://github.com/openfaas-incubator/of-watchdog/releases/download/0.4.5/of-watchdog > /usr/bin/fwatchdog \
-    && chmod +x /usr/bin/fwatchdog
-WORKDIR /root/
+RUN apt-get update \
+    && apt-get install -y curl \
+    && curl -sSLf https://github.com/openfaas-incubator/of-watchdog/releases/download/0.4.5/of-watchdog > /usr/bin/fwatchdog \
+    && chmod +x /usr/bin/fwatchdog \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
 
 COPY server.ps1 server.ps1
 

template/powershell-http/function/handler.ps1

@@ -1,4 +1,5 @@
-Param(
+function Handler {
+  Param(
   [Parameter(Mandatory=$true)]
   [FunctionContext]$fnContext,
   [Parameter(Mandatory=$true)]
@@ -8,3 +9,5 @@ Param(
 $output = "Hello! Your input was: " + $fnContext.Body
 
 $fnResponse.Body = $output
+  
+}

template/powershell-http/server.ps1

@@ -19,6 +19,8 @@ $listener = New-Object System.Net.HttpListener
 $listener.Prefixes.Add("http://*:8081/")
 $listener.Start()
 
+. "./function/handler.ps1"
+
 do {
     $context = $listener.GetContext()
     $response = $context.Response
@@ -40,7 +42,7 @@ do {
     $fnResponse = [FunctionResponse]::new()
     $fnResponse.Headers = [System.Net.WebHeaderCollection]::new()
     try {
-        . .\function\handler.ps1 -fnContext $fnContext -fnResponse $fnResponse
+        Handler -fnContext $fnContext -fnResponse $fnResponse
 
         $Content = [System.Text.Encoding]::UTF8.GetBytes($fnResponse.Body)
         $response.StatusCode = $(If ($fnResponse.Status) {$fnResponse.Status} Else {200}) #default to 200 response if not set