Add database and config file support.

.env.example

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+# TechnicFlux Configuration File
+# For support: https://github.com/Zandercraft/TechnicFlux/
+# =========================================================
+# This is an example configuration file and is not active.
+# Copy and rename it to .env before starting TechnicFlux.
+# (Read the README.md file for more detailed instructions)
+
+# (REQUIRED) The connection string for your MongoDB instance (including the database)
+# Ex. (No SSL): mongodb://myDatabaseUser:D1fficultP%40ssw0rd@127.0.0.1/myDatabaseName
+# Ex. (SSL): mongodb+srv://myDatabaseUser:D1fficultP%40ssw0rd@server.example.com/myDatabaseName
+# See https://www.mongodb.com/docs/manual/reference/connection-string/
+MONGODB_CONN_STRING="mongodb://localhost:27017/technicflux"
+
+# (REQUIRED) Admin Username and Password
+# The username and password for the administrator account. CHANGE THIS!
+ADMIN_USER="flux"
+ADMIN_PASS="flux"
+
+# (REQUIRED) The name of your TechnicFlux instance.
+NAME="A TechnicFlux Instance"
+
+# (REQUIRED) The public hostname of the website (i.e. the full domain name without any path, http://, or https://)
+HOST="example.com"
+
+# (REQUIRED) Solder API Key
+# 1. Go to https://www.technicpack.net/
+# 2. Sign into your account and navigate to My Profile
+# 3. Go to Solder Configuration and put your API key here
+# 4. Put your solder API URL (http[s]://example.com/api/) in and link it.
+API_KEY=""
+
+# (Optional) Default Author Name (for custom files)
+# This is the name that will be pre-filled when you go to upload custom files for a modpack.
+# Unset behaviour: You will need to specify the author every time.
+AUTHOR_NAME="John Doe"