add: remote builder defs

remote-builder/nginx-php/README.md

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+# Nginx & PHP
+
+1. Build the container via the Sylabs Remote Builder
+
+2. Pull container from the library
+    ```sh
+    singularity pull nginx.sif library://<cloud-image-path>
+    ```
+
+3. Start the container image.
+    ```sh
+    sudo singularity instance start --writable-tmpfs --net --network bridge --network-args "portmap=8080:80/tcp" nginx.sif nginx
+    ```
+
+4. Access the nginx container running on port 8080
+    ```sh
+    $ curl -i localhost:8080/index.php
+
+    HTTP/1.1 200 OK
+    Connection: keep-alive
+    Content-Type: text/html; charset=UTF-8
+    Date: Mon, 07 Jun 2021 15:45:43 GMT
+    Server: nginx/1.21.0
+    Transfer-Encoding: chunked
+    X-Powered-By: PHP/8.0.6
+
+    <h1>Hello from php and nginx in a sif</h1>
+    ```

remote-builder/nginx-php/nginx.def

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+Bootstrap: docker
+From: nginx:alpine
+
+%setup
+
+cat > /tmp/default.conf <<EOF
+server {
+    listen 80 default_server;
+    listen [::]:80 default_server;
+    server_name _;
+
+    root /var/www/html;
+    error_log  /var/log/nginx/error.log;
+    access_log /var/log/nginx/access.log;
+
+    index index.php index.html index.htm index.nginx-debian.html;
+
+    location / {
+        try_files $uri $uri/index.php =404;
+    }
+
+    location ~ \.php$ {
+        fastcgi_pass 127.0.0.1:9000;
+        fastcgi_index index.php;
+        include fastcgi.conf;
+    }
+
+    location ~ /\.(?!well-known).* {
+        deny all;
+    }
+}
+EOF
+
+cat > /tmp/index.php <<EOF
+<?='<h1>Hello from php and nginx in a sif</h1>'; ?>
+EOF
+
+cat > /tmp/php.conf <<EOF
+[www]
+user = www
+group = www
+listen = 127.0.0.1:9000
+EOF
+
+%files
+    /tmp/default.conf /etc/nginx/conf.d/default.conf
+    /tmp/index.php /var/www/html/index.php
+    /tmp/php.conf /etc/php8/php-fpm.d/php.conf
+
+%startscript
+    php-fpm8 -D
+    nginx -g "daemon off;"
+
+%post
+    apk update
+    apk add ca-certificates wget openssl curl
+    update-ca-certificates
+    apk add php8-fpm php8-cli php8-mysqli php8-pdo php8-pdo_mysql
+    ln -s /usr/bin/php8 /usr/bin/php
+    mkdir -p /var/www/html

remote-builder/nodejs/README.md

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+# Node.js
+
+[Node.js](https://nodejs.org/en/) is a JavaScript runtime built on Chrome's V8 JavaScript engine.
+
+A quick run through follows:
+1. Build the container via the Sylabs Remote Builder
+2. Pull the container with:
+    ```sh
+    singularity pull node.sif library://<cloud-image-path>
+    ```
+3. Run the container as an instance:
+    ```sh
+    singularity instance start node.sif node
+    ```
+4. Access the web-server via curl
+    ```sh
+    $ curl -i localhost:4000
+
+    HTTP/1.1 200 OK
+    X-Powered-By: Express
+    Content-Type: text/html; charset=utf-8
+    Content-Length: 12
+    Date: Mon, 07 Jun 2021 15:26:29 GMT
+    Connection: keep-alive
+    Keep-Alive: timeout=5
+
+    Hello World!
+    ```

remote-builder/nodejs/nodejs.def

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+Bootstrap: docker
+From: node:16-alpine
+
+%setup
+  mkdir -p ${SINGULARITY_ROOTFS}/usr/local/share/node/app
+  mkdir -p app
+cat > app/index.js <<EOF
+const express = require("express");
+const app = express();
+const port = 4000;
+
+app.get("/", (req, res) => {
+  res.send("Hello World!");
+});
+
+app.listen(port, () => {
+  console.log(`Example app listening at http://localhost:${port}`);
+});
+EOF
+
+cat > app/package.json <<EOF
+{
+  "name": "node",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "express": "^4.17.1"
+  }
+}
+EOF
+
+%files
+  app /usr/local/share/node
+
+%startscript
+  node /usr/local/share/node/app/index.js
+
+%post
+  mkdir -p /usr/local/share/node/app/
+  cd /usr/local/share/node/app/
+  yarn